Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            2054      1756      22.971001  23.41684   23.089279  0.063043   23.088855 
2008            2054      1756      18.730354  19.903484  19.223016  0.264568   19.224968 
2009            2054      1756      19.994968  21.428484  20.523025  0.269745   20.464274 
2010            2054      1756      19.605097  20.590387  19.945038  0.153642   19.947258 
2011            2054      1756      19.413355  20.276711  19.774171  0.172899   19.775178 
2012            2054      1756      20.120291  20.97471   20.461262  0.144052   20.429597 
2013            2054      1756      19.85      20.929193  20.340862  0.243609   20.378967 
2014            2054      1756      20.207161  21.464161  20.555378  0.183295   20.551146 
2015            2054      1756      19.541645  20.42058   19.936688  0.132509   19.955564 
2016            2054      1756      20.511194  21.271839  20.839571  0.145809   20.878661 
2017            2054      1756      21.481031  22.083612  21.735996  0.113786   21.762015 
2018            2054      1756      21.936581  22.573193  22.212738  0.140064   22.207903 
2019            2054      1756      21.297483  21.823257  21.45089   0.090675   21.441371 
2020            2054      1756      20.131742  21.102774  20.569844  0.179021   20.601001 
2021            2054      1756      21.502193  21.799871  21.645256  0.056141   21.645564 
2022            2054      1756      18.30942   19.706194  18.90307   0.237711   18.867645 
2023            2054      1756      19.447258  20.597548  19.986229  0.211015   19.99158